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Core_UTF8::strpos

Finds position of first occurrence of a UTF-8 string. This is a UTF8-aware version of strpos.

$position = UTF8::strpos($str, $search);

integer Core_UTF8::strpos( string $str , string $search [, integer $offset = integer 0 ] )

author: Harry Fuecks hfuecks@gmail.com
uses: IS_MBSTRING

参数列表

参数类型描述默认值

$str string Haystack

$search string Needle

$offset integer Offset from which character in haystack to start searching integer 0

参数	类型	描述	默认值
`$str`	`string`	Haystack
`$search`	`string`	Needle
`$offset`	`integer`	Offset from which character in haystack to start searching	integer 0

返回值

integer position of needle
boolean FALSE if the needle is not found

File: ./core/classes/utf8.class.php

public static function strpos($str, $search, $offset = 0)
{
    $offset = (int)$offset;

    if (IS_MBSTRING) return mb_strpos($str, $search, $offset, Core::$charset);

    if (UTF8::is_ascii($str) && UTF8::is_ascii($search) ) return strpos($str, $search, $offset);

    if ( $offset == 0 )
    {
        $array = explode($search, $str, 2);
        return isset($array[1]) ? UTF8::strlen($array[0]) : FALSE;
    }

    $str = UTF8::substr($str, $offset);
    $pos = UTF8::strpos($str, $search);
    return ($pos === FALSE) ? FALSE : $pos + $offset;
}